macos: install the 'isolator' cask
macos: install the 'isolator' cask

Isolator (https://www.willmore.eu/software/isolator/):

> Isolator is a small menu bar application that helps you concentrate.
> When you're working on a document, and don't want to be distracted,
> turn on Isolator. It will cover up your desktop and all the icons on
> it, as well as the windows of all your other applications, so you can
> concentrate on the task in hand.

jparise/dotfiles,jparise/dotfiles,jparise/dotfiles,jparise/dotfiles